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Commit 3d31e215 authored by Peter Ujfalusi's avatar Peter Ujfalusi Committed by Andrzej Hajda
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drm/bridge: ti-tfp410: Fall back to HPD polling if HPD irq is not available 



In case either the HPD gpio is not specified or when the HPD gpio can not
be used as interrupt we should tell the core that the HPD needs to be
polled for detecting hotplug.

Signed-off-by: default avatarPeter Ujfalusi <peter.ujfalusi@ti.com>
Reviewed-by: default avatarLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: default avatarAndrzej Hajda <a.hajda@samsung.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190401123342.15767-1-peter.ujfalusi@ti.com
parent beb941b9

drivers/gpu/drm/bridge/ti-tfp410.c

+11 −3
Original line number Diff line number Diff line
@@ -31,6 +31,7 @@ struct tfp410 { 


	struct i2c_adapter	*ddc;

	struct gpio_desc	*hpd;

	int			hpd_irq;

	struct delayed_work	hpd_work;

	struct gpio_desc	*powerdown;
@@ -124,8 +125,10 @@ static int tfp410_attach(struct drm_bridge *bridge) 
		return -ENODEV;

	}



	if (dvi->hpd)

	if (dvi->hpd_irq >= 0)

		dvi->connector.polled = DRM_CONNECTOR_POLL_HPD;

	else

		dvi->connector.polled = DRM_CONNECTOR_POLL_CONNECT | DRM_CONNECTOR_POLL_DISCONNECT;



	drm_connector_helper_add(&dvi->connector,

				 &tfp410_con_helper_funcs);
@@ -324,10 +327,15 @@ static int tfp410_init(struct device *dev, bool i2c) 
		return PTR_ERR(dvi->powerdown);

	}



	if (dvi->hpd) {

	if (dvi->hpd)

		dvi->hpd_irq = gpiod_to_irq(dvi->hpd);

	else

		dvi->hpd_irq = -ENXIO;



	if (dvi->hpd_irq >= 0) {

		INIT_DELAYED_WORK(&dvi->hpd_work, tfp410_hpd_work_func);



		ret = devm_request_threaded_irq(dev, gpiod_to_irq(dvi->hpd),

		ret = devm_request_threaded_irq(dev, dvi->hpd_irq,

			NULL, tfp410_hpd_irq_thread, IRQF_TRIGGER_RISING |

			IRQF_TRIGGER_FALLING | IRQF_ONESHOT,

			"hdmi-hpd", dvi);